Sensors 2012, 12(11), 15438-15466; doi:10.3390/s121115438
Article

An Energy-Efficient Strategy for Accurate Distance Estimation in Wireless Sensor Networks

Data Processing and Simulation Group, Universidad Politécnica de Madrid, ETSI. Telecomunicación, Avda. Complutense 30, 28040, Madrid, Spain
* Author to whom correspondence should be addressed.
Received: 5 September 2012; in revised form: 31 October 2012 / Accepted: 31 October 2012 / Published: 9 November 2012
(This article belongs to the Section Sensor Networks)
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Abstract: In line with recent research efforts made to conceive energy saving protocols and algorithms and power sensitive network architectures, in this paper we propose a transmission strategy to minimize the energy consumption in a sensor network when using a localization technique based on the measurement of the strength (RSS) or the time of arrival (TOA) of the received signal. In particular, we find the transmission power and the packet transmission rate that jointly minimize the total consumed energy, while ensuring at the same time a desired accuracy in the RSS or TOA measurements. We also propose some corrections to these theoretical results to take into account the effects of shadowing and packet loss in the propagation channel. The proposed strategy is shown to be effective in realistic scenarios providing energy savings with respect to other transmission strategies, and also guaranteeing a given accuracy in the distance estimations, which will serve to guarantee a desired accuracy in the localization result.
Keywords: energy consumption; distance estimation; sensor networks

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MDPI and ACS Style

Tarrío, P.; Bernardos, A.M.; Casar, J.R. An Energy-Efficient Strategy for Accurate Distance Estimation in Wireless Sensor Networks. Sensors 2012, 12, 15438-15466.

AMA Style

Tarrío P, Bernardos AM, Casar JR. An Energy-Efficient Strategy for Accurate Distance Estimation in Wireless Sensor Networks. Sensors. 2012; 12(11):15438-15466.

Chicago/Turabian Style

Tarrío, Paula; Bernardos, Ana M.; Casar, José R. 2012. "An Energy-Efficient Strategy for Accurate Distance Estimation in Wireless Sensor Networks." Sensors 12, no. 11: 15438-15466.

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